diff --git a/release-notes.html b/release-notes.html
index 46b12f4..7dcc6a0 100644
--- a/release-notes.html
+++ b/release-notes.html
@@ -13,9 +13,11 @@
 	<header>
 		<h2><a href="#0.21">Version 0.21</a></h2>
 	</header>
-	<p>TBD</p>
+	<p>Sep 27th, 2009</p>
 	<ul>
 		<li>Fix <a href="https://bugs.launchpad.net/scour/+bug/427309">Bug 427309</a> by updated Scour inkscape extension file to include yocto_css.py</li>
+		<li>Fix <a href="https://bugs.launchpad.net/scour/+bug/435689">Bug 435689</a> by properly preserving whitespace in XML serialization</li>
+		<li>Fix <a href="https://bugs.launchpad.net/scour/+bug/436569">Bug 436569</a> by getting xlink:href prefix correct with invalid SVG</li>
 	</ul>
 </section>
 
diff --git a/scour.py b/scour.py
index 9b69595..2340e83 100755
--- a/scour.py
+++ b/scour.py
@@ -2375,6 +2375,8 @@ def parse_args(args=None):
 		_options_parser.error("Can't have negative significant digits, see --help")
 	if not options.indent_type in ["tab", "space", "none"]:
 		_options_parser.error("Invalid value for --indent, see --help")
+	if options.infilename and options.outfilename and options.infilename == options.outfilename:
+		_options_parser.error("Input filename is the same as output filename")
 
 	if options.infilename:
 		infile = maybe_gziped_file(options.infilename)